OK, I've done a little more "investigating" and have some "answers" that I'm not sure fit any "questions", but here's what I can tell you, based on my own "experiments".
I'm currently at work, where there is a Logitech C920 Webcam that identifies itself to LabVIEW as "HD Pro Webcam C920 (#<128 bit ID goes here, shown as a Text string>).icd. This ID is stored in C:\Users\Public\Public Documents\National Instruments\NI-IMAQdx\Data. I'm making a Note to Myself to remember to attach this, and some additional files, to this Reply "for your viewing pleasure". Also in this folder is a file "cam1.iid" which in its [CAMERA_INTERFACE_DATA] has the filename of the .icd Camera File saved as "CameraFile = "HD Pro Webcam C920 (etc.).icd".
The ICD contains two Sections, [NIIMAQ HEADER] and {CAMERA DATA], The first section has two entries, the second has 40 entries. The IID file is much smaller: its [NIIMAQ HEADER] is the same as the ICD, and its [CAMERA_INTERFACE_DATA] has 7 entries that identify the Camera and provide a link (by filename) to the ICD.
As I mentioned to you, I had written (a few years ago, when I was struggling to try to use a fancy USB 3 camera made by FLIR, for which I was able to get IMAQdx to open (after I disabled the native Driver), but could not get to take satisfactory videos using IMAQdx) a utility that uses IMAQdx functions to get all of the Camera Attributes, and write them to a .csv file. This is attached as "cam1 Attributes.csv". The file lists the name of the Attribute, the Type of the Attribute, its Read/Write status, and its default value. Note that this file has 55 entries, 15 more than the Attributes shown in the .icd file. My brain is already hurting too much having to review the pain of trying to get this camera to work for me -- I'll let you study the listings and see if you can understand why they differ. [My guess is it's a "GenICam" thing gone awry ...].
Finally, there are those tricky Enums, which take on "Vendor-specific values"] (I think). I wrote another little utility to list the (ordered) values of the Enums (again, which I never ended up using as I abandoned this Project]. That's attached as "cam1 Enum Attribs.txt".
So you should be able to find the first two files (.icd and .iid) in your Public Documents folder, and can get a hint of what Camera Attributes and Enum definitions are used for the Logitech C920 camera, some (or all?) of which should be visible in MAX (I haven't checked this out -- too tedious).
I hope this is useful. I do like LabVIEW, and when I can use an "old-fashioned" WebCam or IP Camera for modest Vision applications, I'm not afraid to get my fingers dirty, but otherwise tackling NI Vision is not for the Faint of Heart, and definitely not for the "one-man shop" -- you really need at least two people talking/arguing/trying things out to maintain your sanity.
Bob Schor
Attach: HD Pro Webcam C920 (stuff).icd
cam1.iid
cam1 Attributes.csv
Enum Attribs.txt
